Don't add a second method for attribute existence

We already had one in the public API that people can use more easily for
the transition

1 files changed, 1 insertions, 6 deletions

diff --git a/activerecord/lib/active_record/attribute_methods.rb b/activerecord/lib/active_record/attribute_methods.rb
index 75154a7975..e3ac891520 100644
--- a/activerecord/lib/active_record/attribute_methods.rb
+++ b/activerecord/lib/active_record/attribute_methods.rb
@@ -202,17 +202,12 @@ module ActiveRecord
         if column.nil?
           ActiveSupport::Deprecation.warn(<<-MESSAGE.strip_heredoc)
             `column_for_attribute` will return a null object for non-existent columns
-            in Rails 5.0. Use `attribute_exists?` if you need to check for an
+            in Rails 5.0. Use `has_attribute?` if you need to check for an
             attribute's existence.
           MESSAGE
         end
         column
       end
-
-      # Returns whether or not an attribute exists with the given name.
-      def attribute_exists?(name)
-        @attributes.include?(name)
-      end
     end
 
     # A Person object with a name attribute can ask <tt>person.respond_to?(:name)</tt>,